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Make the hexagonal wrench head to fit on the hexagonal nuts is not as easy as one may think, especially when this fiddling has to take place in spots hidden from the eyes. This square wrench head design has guiding slopes at its opening and allows the user to follow any two parallel sides of the nut and glide into a perfect fit.
Ming Chi University of Technology
Taipei City, Taoyuan County, Taiwan
Bade City, Taoyuan County, Taiwan